Here are certain important hereditary jargons. Fill in the blanks by choosing a suitable one from the list given. (allele, variation, speciation, gene, allelomorphs)

i) __________ are the factors which form the physical basis of inheritance.

ii)__________ is the alternate forms of the same gene.

iii)__________ are the expressions of contrasting pair of alleles.

The inheritable characters vary in different species and within the same species. Name the variation in the following cases.

The eye colour among the human beings are varied as blue, black, brown, green, etc.

i) This is called as _______variation.

The dentition in the rabbit and the elephant are not the same.

ii) This is called as __________ variation.

Sexually reproducing organisms produce offspring with marked, significant and visible variation. Asexually reproducing offspring show minor variations.

i) Do you agree with the above statements?

ii) Among the following organisms point out the asexually reproducing organism.

(Cockroach, Euglena, Earthworm and Bird)

A change that affects the body cell is not inherited. However, a change in the gamete is inherited. The effects of radiation at Hiroshima have been affecting generations.

Analyze the above statements and give your interpretation.

Sequentially arrange the different species of man from primitive to modern man.

(Neanderthal man, Homo habilis, Homo erectus, Homo sapiens)